In doing the chemical formula experiment, the mass of original sample of compound was 2.438 g, and the mass of copper obtained was 1.087 g.  Based on these numbers, calculate the mass of chlorine in the original sample in grams. Include the unit and three decimal places in your answer.

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A: Given, Initial mass of copper = 1.321 g Mass of copper obtained at the end = 0.962 g

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